28081815741 has 24 divisors (see below), whose sum is σ = 47610186624. Its totient is φ = 15613054560.

The previous prime is 28081815739. The next prime is 28081815763. The reversal of 28081815741 is 14751818082.

It is not a de Polignac number, because 28081815741 - 2¹ = 28081815739 is a prime.

It is a super-2 number, since 2×28081815741² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081815731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6021225 + ... + 6025886.

It is an arithmetic number, because the mean of its divisors is an integer number (1983757776).

Almost surely, 2^28081815741 is an apocalyptic number.

28081815741 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28081815741 is a deficient number, since it is larger than the sum of its proper divisors (19528370883).

28081815741 is a wasteful number, since it uses less digits than its factorization.

28081815741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12047161 (or 12047158 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The spelling of 28081815741 in words is "twenty-eight billion, eighty-one million, eight hundred fifteen thousand, seven hundred forty-one".